I love my great aunt very much, and I like to express my love by texting her, neither accepting nor refusing.

She is not confident. Because she is your aunt. She has a bad experience and a bad husband, and of course she wants to get rid of that life. Actually, she has a crush on you, too. To put it bluntly, if you are bolder, I think you should be more active and direct. And this matter, think more about the consequences, after all, is a sister-in-law. If you want to live, you'd better go elsewhere.